perf: METH_FASTCALL, tp_vectorcall, and related optimizations #147

Performance Gate Passed

✅ 10 untouched benchmarks
🆕 24 new benchmarks
⏩ 86 skipped benchmarks¹

	Benchmark	`BASE`	`HEAD`	Efficiency
🆕	`test_xxh32_ctor_empty`	N/A	84.2 µs	N/A
🆕	`test_xxh32_ctor`	N/A	85.9 µs	N/A
🆕	`test_xxh32_ctor_seed`	N/A	86.8 µs	N/A
🆕	`test_xxh3_64_intdigest_5b_seed_kw`	N/A	85.6 µs	N/A
🆕	`test_xxh32_hexdigest_5b`	N/A	85.1 µs	N/A
🆕	`test_xxh64_intdigest_5b`	N/A	84.8 µs	N/A
🆕	`test_xxh64_stream_intdigest_2mb`	N/A	1.8 ms	N/A
🆕	`test_xxh64_ctor`	N/A	86.7 µs	N/A
🆕	`test_xxh64_intdigest_str`	N/A	86 µs	N/A
🆕	`test_xxh32_intdigest_5b_seed_kw`	N/A	85.5 µs	N/A
🆕	`test_xxh32_intdigest_5b_seed`	N/A	87.1 µs	N/A
🆕	`test_xxh3_128_ctor`	N/A	87.8 µs	N/A
🆕	`test_xxh32_intdigest_str`	N/A	85.4 µs	N/A
🆕	`test_xxh3_128_intdigest_5b`	N/A	86.9 µs	N/A
🆕	`test_xxh3_128_intdigest_str`	N/A	87 µs	N/A
🆕	`test_xxh3_64_ctor`	N/A	87.5 µs	N/A
🆕	`test_xxh3_64_stream_intdigest_2mb`	N/A	1.6 ms	N/A
🆕	`test_xxh3_64_intdigest_5b`	N/A	84.7 µs	N/A
🆕	`test_xxh3_64_intdigest_str`	N/A	85.3 µs	N/A
🆕	`test_xxh64_hexdigest_5b`	N/A	86.5 µs	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

_{Comparing vectorcall (a974b6b) with master (1585d2b)}

86 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩